ask your doctor if including advair could help improve your lung function. [ male announcer ] advair diskus fluticasone propionate and salmeterol inhalation powder. get your first prescription free and save on refills at advaircopd.com. [ agent smith ] i've found software that intrigues me. it appears it's an agent of good. ge has wired their medical hardware with innovative software to be in many places at the same time. using data to connect patients to software, to nurses to the right people and machines. ♪ helping hospitals treat people even better, while dramatically reducing waiting time. now a waiting room is just a room. [ telephone ringing ] [ static warbles ] [ beeping ] red or blue? ♪ >>> marathon day, patriots day is supposed to be a great day every day in boston. instead this year it turned into a horrible day. nbc's katy tur is on the streets of boston tonight. what can you tell us there? >> reporter: brian, the sun is setting here and the runnerers are making their way back home, back to your hotels. families are reuniting with loved ones, trying to see if everyone